What is Gravity?
Solar Gravity resulted celestial objects are in each orbit around the sun in a gravity force of attraction that occurs between all particles have mass in the universe.
Modern physics describes gravitation using Einstein's Theory of General Relativity, but Newton's law of universal gravitation is a simpler approximation is quite accurate in most cases.
For example, the earth has a huge mass produce very large gravitational force to pull in surrounding objects, including living creatures, and objects on earth. The force of gravity is also interesting objects that exist in space, like the moon, meteors, and other celestial bodies, including the man-made satellite.
Sir Isaac Newton
Sir Isaac Newton was a physicist, mathematician, astronomer and chemist who came from England. He also scientists largest and most influential in the world who ever lived, was born in Woolsthrope, England, right on Christmas day in 1642, the year coinciding with the death of Galileo. Like the Prophet Muhammad, he was born after his father died he was followers of the heliocentric and scientists who are highly influential throughout history, even regarded as the father of modern physics.
Newton's Theory of Gravity
Newton's law of universal gravitation is formulated as follows:
Every other point mass of mass appealing style in line with the line connecting the two points. Great force is proportional to the multiplication of two masses and inversely proportional to the square of the distance between the two point masses.
- F is the force of gravity between two masses that point
- G is the gravitational constant
- m1 is the mass of the first point
- m2 is the mass of the second point
- r is the distance between the two point masses, and
- g is the acceleration due to gravity = G \ frac {m_2} {r ^ 2}
In the International System, F is measured in newtons (N), m1 and m2 in kilograms (kg), r in meters (m), and the constant G is approximately equal to 6.67 × 10? 11 N m2 kg? 2.
This equation can be derived from the equation to calculate the weight. Weight of a body is the product of the mass of the object by gravity. The equation can be written as follows: W = mg. W is the weight of the object force, m is mass and g is the acceleration due to gravity. Acceleration of gravity varies from place to place.
Albert Einsten
Albert Einstein was arguably the most famous scientist in the 20th century. Einstein was a theoretical physicist who is widely regarded as the greatest scientist of the 20th century. Discovery of the theory of relativity that the future of human misused for nuclear weapons development. Einstein also greatly contributed to the development of quantum mechanics, statistical mechanics, and cosmology. He was awarded the Nobel Prize in Physics in 1921 for his discovery of the photoelectric effect and "for his services to Theoretical Physics". Having formulated the theory of general relativity, Einstein became world famous, an unusual achievement for a scientist. Einstein popularity surpassed the popularity of all the scientists in history and Einstein until now a symbol of genius. His face is one of the most recognized in the world until 1999, times magazine named Einstein as a hero of the 20th century.
Einstein's Theory of Gravity
Albert Einstein, who won the Nobel Prize for Physics in 1921, contributing to an alternative theory of gravity in the early 1900's. This theory is part of the theory of general relativity are very famous, and offers a very different explanation of Newton's Law of Universal Gravity. Einstein did not believe that gravity is a force, he said that gravity is a distortion in the form of space and time, otherwise known as the "fourth dimension". Basic law of physics states that if there is no external force that works, an object will always walk in a straight line. Thus, no external force, the two objects are running in parallel will always remain parallel and will never meet. But the fact is they finally met, too. The particles start running on a parallel track will sometimes end up colliding.
Newton's theory says this can happen due to gravity, gravity will pull the objects to each other or to a third single object. Einstein also said this happens because of gravity, but in theory, gravity is not a force but a curve in space-time. According to Einstein, things are still moving along a straight line, but due to the distortion of space and time, a straight line is now transformed into a curved line. So two objects initially moving along a flat, now move along the curved field. And two straight lines will expire in one titik.Teori Newton said this could happen due to gravity, gravity will pull the objects to each other or to a third single object. Einstein also said this happens because of gravity, but in theory, gravity is not a force but a curve in space-time. According to Einstein, things are still moving along a straight line, but due to the distortion of space and time, a straight line is now transformed into a curved line. So two objects initially moving along a flat, now move along the curved field. And two straight lines will end at one point.
What Happens If No Gravity in the Universe?
According to James Overduin, a physicist at Towson University in Maryland who specializes in gravity, a universe without gravity would be completely flat and formless. Overduin explained gravity is just another term to describe the curvature of space-time, or how steep and shallow universe at that particular spot.
What Happens If No Gravity in the Universe
We face will surely swell. Under normal circumstances the force of gravity on the body fluids push us toward the feet. Without gravity, all body fluids will be collected to the head and face causing swelling. Instead our feet would shrink to be very small.
In addition, because there is no pressure on the bones and joints, our bodies will be 2-5 cm higher. Actually, the weight of an object is the magnitude of the gravitational attraction of the earth on the object. So if there is no gravity, the scales will always show the number 0 even though there are items placed on it.
Why are people on the other side of the earth does not fall?
Every object in the universe attract each other with a force (gravity) that is proportional to mass and inversely proportional to the square of the distance between objects. Because the earth is so big and attract our attention (no matter where we stand) with a force strong enough to keep us from falling. Read on for a more detailed explanation.
- Fact 1. Mass is a measure of how much matter in an object. On Earth, mass and weight are effectively the same thing
- Fact 2. Mass2 earth is about: 6,000,000,000,000,000,000,000,000 kg or lb 13,000,000,000,000,000,000,000,000
- Fact 3. Gravity is an attractive force between two objects in the universe. Attractive force of two objects is proportional to the product of the masses and inversely proportional to the square of the distance between them. Below, the gravitational attraction at the picture right because they are larger and closer together.
Gravity pulls act between the centers of two objects. In the case of the person standing on the Earth's surface, the effect of gravity is to pull us towards the center of the earth. As a result, no matter where you stand on Earth, you will not fall.
Source from here.
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